Improvement in stoves



UNITED STATES PATENT OFFICE.

JOHN A. MARVIN AND SAMUEL D. VOSE, OF MILWAUKEE, WISCONSIN.

IMPROVEMENT IN STOVES.

Specification forming part of Letters Patent No. 157,016, dated November17, 1874; applicatlon filed February 13, 1874.

To all whom'z't may concern:

Be.it known that we, JOHN A. MARVIN and SAMUEL D. VosE, both ofMilwaukee, in the county of Milwaukee and State of Wisconsin, haveinvented certain new and useful Improvements in Magazine-Stoves, ofwhich the following is a specification Our invention relates to magazineheatingstoves for burning soft coal. The magazine and its surroundingair-chamber, in connection with the vertical heating-fine surroundingthe magazine, and the revertible base-flue with airdischarge orifice atthe junction of this iiue with that surrounding the magazine, have beenused in heaters of this class, and in which these features have beencombined with cooking-ovens arranged both below and above the magazine.We are not aware, however, that such magazine stoves have beenconstructed with the special design for burning soft coal, and in whichthe flame from the combustion-chamber has been divided alike within therevertible and vertical iiues, or directedwholly downward, as may bedesired, and in which a heating-radiator has been 1ocated above themagazine, for the purpose of transferring the ame from thecombustionchamber directly into the radiator at the top of the stove.

In the accomplishment of these advantages our improvements consist inthe combination of the escape-pipe with the top radiator, thecombustion-chamber, and the ash` pit chamber, with which said pipecommunicates, and in which said communication with thecombustion-chamber is made above the outlet of the magazine by adampered opening, whereby the draf't of the stove is increased inkindling direct from the `fire chamber, and the said draft-openingprevented from being closed by the feed from the magazine; also, in thecombination of the dampers in the escape-pipe, the air-inlet, and basedraft-dampers with the revertible and vertical flues, the air-outlet andthe top radiator, whereby the flame may be divided both upward anddownward from the air-impinging point, or caused entirely7 to descendthe revertible ue, whereby the combustion can be increased or diminishedat pleasure, and the draft placed under easy control.

The accompanying drawing represents a vertical section of amagazine-stove embracing our invention.

The heater has the ordinary magazine A for the fuel, with the tire-potB, and the revertible flue O below communicates with the ash-pit D, inthe usual manner. The magazine is either located centrally oreccentrically with the case E; butin either case there is a verticalactive line, F, between it and the casing. This flue F joins the space Gabove the Erepot, and opens directly into a top radiator, H, into whichthe magazine enters. An air-chamber, I, surrounds the magazine A,extending from its top to its bottom, and increasing in arca from thebottom upward, so as to form a contracted orifice, a, at the bottom,from which the heated air passes into the lire-space. This air-chamberis supplied by a dampered pipe, J j, opening from the outside throughthe casing. The radiator H, as will be seen, is located above themagazine, and forms a prolongation of the vertical open iiue F, andthereby a direct communication with the fire-pot, leaving free courseofthe ame therefrom up into the top radiator, to heat alike the top andbottom of the stove. The escape-pipe K joins the stove at three points,viz., the ash-pit chamber at L, the fire-pot chamber at M, and the topradiator at N, and the openings M N are regulated and closed by dampersd e, while the ash-pit has the usual dampered opening P. The damperedopening M joins the fire-chamber above the outlet of the magazine, inorder that it will be free from being closed by the feed of the coal,and for increasing the draft in starting the lire, as by this outlet astrong draft is obtained directly at the point of kindling, instead4 ofat the top of the stove. The dampers j d e are capable of adjustment, togive complete control over the fire.

The combustion is most active when the three dampersj e P are open. Thefire is modified by closing the damper e in the top radiator. It isfurther reduced by closing the damper j, to cut olf the supply of air;and closing all three of the dampers brings the coal to a smolderingstate, but ready to burn quickly as the draft may belet on. By closingdampers e and P, and slightly opening damper j, a gentle slow fire canbe secured, by which a moderate heat only will be diffused, which isgenerally desirable at night, at the same time preventing theaccumulation and deposit of soot in the flues.

By this arrangement of the dampers, in connection with the tlues and theradiator, the flame is divided at the air-inlet a, descending therevertible ue, and, rising to the top radiator H, heating alike theentire surface of the stove. In the production of this result, ofcourse, the dampers must be suitably adjusted. Itis not the introductionof the air at the junction of the lues with the re-chamber that eft'ectsthe burning Of the coal by both upward and downward draft, but thecombination, with these things, of the top radiator and the damperedopenings described.

The stove is fed through a side door in the radiator, the draft-damper eand the top damperf being opened.

We claim- 1. The combination Of the smoke pipe K with the top radiatorH, the combustion-chamber G, and the ash-pit chamber D, with which JOHNA. MARVIN. SAMUEL D; VOSE.

Witnesses to the signature of JOHN A. MAR- VIN FRED. REUss, l A GUsTAvREUss. Witnesses to the signature of SAML. D. Voss A. E. H. JOHNSON,

J. W. HAMILTON JOHNSON.

